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目的了解中学学生体育课运动强度、有效运动时间状况及其存在的问题,为指导学校上好体育课提供参考。方法采用现场监测的方法,2012年6月—2013年6月间对北京市海淀区、西城区8所项目中学的目标年级学生,监测其194节体育课的最大心率、平均心率、心率≥120次/min的时间和总耗能等指标,并分析各项指标与能量消耗的关系。结果 194节体育课最大心率合格率为88.66%,平均心率合格率为68.04%,心率≥120次/min的时间合格率仅为19.59%;3项指标均合格的体育课仅有13.92%。平均每节体育课的总耗能为(290.18±90.60)kcal(1 kcal=4.18 k J)。经线性回归分析,平均最大心率(B=1.162)、平均心率(B=1.053)和心率≥120次/min的时间(B=5.209)是体育课总耗能的保护性因素。结论中学体育课运动强度不够、有效运动时间不足,影响体育课总耗能,导致运动负荷偏低,影响运动效果,因此要加强对体育课的监测与指导,提高体育课课堂教学锻炼效果。
Objective To understand the exercise intensity of middle school students physical education, effective exercise time and its problems, to provide guidance for the good physical education in schools. Methods By means of on-site monitoring, from June 2012 to June 2013, the target students of 8 middle schools in Haidian District and Xicheng District of Beijing were monitored for their maximum heart rate, average heart rate and heart rate ≥120 Times / min and total energy consumption and other indicators, and analyze the relationship between indicators and energy consumption. Results The pass rate of the maximum heart rate of 194 PE classes was 88.66%, the average pass rate of heart rate was 68.04%, and the pass rate of heart rate ≥ 120 beats / min was only 19.59%. Only 13.92% of the three pass PE courses. The average total energy consumption per day of physical education is (290.18 ± 90.60) kcal (1 kcal = 4.18 kJ). The linear regression analysis showed that the average maximum heart rate (B = 1.162), average heart rate (B = 1.053) and heart rate ≥120 beats / min (B = 5.209) were the protective factors of total PE energy expenditure. Conclusions The physical strength of middle school physical education is not enough and the effective exercise time is insufficient, which will affect the total energy consumption of physical education, which leads to low exercise load and affects the effect of exercise. Therefore, we should strengthen the monitoring and guidance of physical education and improve the effect of classroom teaching and training.